Rifle 5.56mm, XM16E1, Operation and Cycle of Functioning TF9-3663
US Army Training Film on the XM16E1 rifle, the first mass-fielded version of the M16 rifle. This is the version with chrome-plated bolt carrier, no trap door in the buttstock, no forward assist, non-chrome-lined chamber, and three-prong flash supressor. Somewhat notorious for reliability issues in the jungles of Vietnam, it was upgraded into the much more reliable M16A1 in 1967. Most of the basic information in this video is just as true today for the M16A2/A4 and M4 carbine.
Audio/Visual sound, color
March 29, 2008
Description is incorrect
The XM16E1 did have a forward assist and can be clearly seen in the film.
November 26, 2005
As someone who doesn't know a huge amount about guns and mechanical engineering, I found this pretty interesting: I've often wondered how they managed to make machineguns work with cams and springs and all that pre-digital engineering, and the video goes into it in quite some detail. I'm still amazed that it all works together reliably enough to fire ten times a second (or not realiably, in the case of the original M16!).